425 missing on one cylinder

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 3 of 3
500, 472, 425, 368 Discussion, 425 missing on one cylinder in Cadillac Engine Discussion; When I was driving back from a 30 mile trip, the engine oil pressure light came on if the rpm's ...
  1. #1
    7.0,hellyeah is offline Cadillac Owners Fanatic
    Join Date
    Apr 2004

    425 missing on one cylinder

    When I was driving back from a 30 mile trip, the engine oil pressure light came on if the rpm's dropped below 1500, then after shutting it off to get gas, when I restarted the car, the engine started shaking quite a bit. When I got the car home, I removed all the spark plugs and found that the #2 had lots of unburned gas and carbon on it. I tried using a new plug, but no dice. Now, in order to get the oil pressure light off, the engine needs to be at about 3000 rpm. Here's some advice I got: 1.Oil filter clogged 2.cat may not be letting air out of the engine fast enough; too much backpressure; overheating 3. Head gasket blown around the #2 cylinder. I don't think the later is true though, because the engine isn't smoking at all, i'mm pretty sure its just gasoline in the chamber. I tried a different spark plug wire, but didn't work. The missing cyl. problem started suddenly, but the oil psi problem was a long process. Any imput at all will help, thanks!

  2. Remove Advertisements

  3. #2
    davesdeville's Avatar
    davesdeville is offline Banned
    Automobile(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
    Join Date
    Aug 2003
    Albuquerque, NM

    Re: 425 missing on one cylinder

    The missing in the cyl and the oil pressure problem would seem to be 2 differant problems. Are you using the original oil pump? How long since you've had an oil change? Distributor cap look ok?

  4. #3
    7.0,hellyeah is offline Cadillac Owners Fanatic
    Join Date
    Apr 2004
    Thread Starter

    Re: 425 missing on one cylinder

    What happened was the bolt holding in the lifters broke, the lifters popped out, and a pushrod got kicked up under the valve covers. Luckily nothing fell into the oil pan and nothing got damaged. I fixed it fairly easily. Does anyone know what the bolts(rocker arm retainers) should be torqued to?

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting